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Data Engineer

Data Engineer

Senior Data Engineer

Keyrock

Remotefulltime

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Role description

About Keyrock
Since our beginnings in 2017, we've grown to be a leading change-maker in the digital asset space, renowned for our partnerships and innovation.

Today, we partner with over 250 team members around the world. Our diverse team hails from 42 nationalities, with backgrounds ranging from self-taught DeFi natives to PhDs. Predominantly remote, we have hubs in London, Brussels, and Singapore, and host regular online and offline hangouts to keep the crew tight.

We are trading on more than 80 trading venues, and working with a wide array of asset issuers. As a well-established market maker, our distinctive expertise led us to expand rapidly. Today, our services span market making, options trading, high-frequency trading, OTC, and DeFi trading desks.

But we’re more than a service provider. We’re an initiator. We're pioneers in adopting the Rust Development language for our algorithmic trading, and champions of its use in the industry. We support the growth of Web3 startups through our Accelerator Program. We upgrade ecosystems by injecting liquidity into promising DeFi, RWA, and NFT protocols. And we push the industry's progress with our research and governance initiatives.

At Keyrock, we're not just envisioning the future of digital assets. We're actively building it.

About The Team And Why The Role Exists
The Central Data Team (CDT) is only a few months old, but data has been Keyrock's lifeblood since day one. We're now building the Keyrock Data Platform to give Keyrockers, and the AI agents working alongside them, the data and context they need to act fast and autonomously within agreed boundaries and aligned with our shared goals. Doing that means taking data from across the company and making sense of it in real time for all the functions that depend on it: trading desks, wealth and asset management, product, risk, finance, compliance, and research to name a few.

You'd be one of the early hires in CDT and we expect you to contribute to most of the bigger decisions and build work. The standards we settle on and the way the team ends up working are still open.

What You’ll Do

  • Build streaming and batch pipelines that ingest, normalise, and distribute market, trading, and portfolio data, resilient to feed and exchange failures.
  • Build the self-serve tooling (SDKs, patterns, templates, AI agents) so other teams publish, consume, and build on data products without waiting on us.
  • Own data contracts and schema evolution. Keep schema changes from turning into multi-team coordination events.
  • Design the lakehouse and time-series layer around consumer query patterns.
  • Build and evolve the Data Governance and Data Quality Framework: stale-feed detection, schema validation, range checks, idempotent writes, lineage, ownership, self-healing.
  • Build the derived analytics the business runs on: cross-exchange spreads, VWAP at depth, order book microstructure for the desks; portfolio views, exposure, performance for wealth and asset management.
  • Make observability, cost, and performance first-class from day one.
  • Treat infrastructure as code (Docker, Terraform, CI/CD) alongside our Central Infrastructure Team.
  • Work in the open: write things down, partner closely with Architecture, Infrastructure, Platform, and the rest of the teams.

What We’re Looking For
Tools matter less to us than how you think about problems. That said, here's the shape of the person we have in mind.

Engineering Craft

  • 8+ years of building production data systems that other people rely on.
  • Strong proficiency in Python and SQL: not just being able to write a query, but being able to reason about what the engine is doing with it.
  • Code that's easy for someone else to read, test, and delete later.
  • Strong understanding of data modelling for both streaming and analytical workloads.
  • Efficiency, quality, idempotency, and observability are taken seriously by default.

Systems Design

  • You've designed and operated streaming systems on Kafka, Redpanda, MSK, or Kinesis, and you have opinions about partitioning, consumer groups, offsets, and schema registries.
  • You've used a time-series store in production (ClickHouse ideally; TimescaleDB, QuestDB, or similar are fine too) and can talk about table design as a function of query patterns.
  • You've worked with a lakehouse architecture and reason about table layout, partitioning, and compaction as design choices that shape query performance and storage cost.
  • You build for self-healing and idempotency. Reprocessing is safe, retries don't double-write, and the system recovers without a human in the loop.

Operational Readiness

  • Docker, Terraform, and CI/CD are how you work, not a separate "DevOps" thing.
  • You think about cost and performance early.
  • You instrument as you build: logs, metrics, and traces are part of the system from day one.
  • You design for data quality and governance up front covering contracts, validation, lineage, and ownership

How You Think and Work

  • You reason from first principles when a problem is new, stay pragmatic when it isn't, and update your view when you learn more.
  • You treat the trading desks, wealth and asset management, product, risk, finance, compliance, and research as customers of what you build, and communicate with them that way.
  • You optimise for outcomes over output. A smaller, simpler thing that ships and works beats a bigger thing that doesn't.
  • You take ownership end-to-end: design, ship, operate, improve.
  • You say what you think including when it's an unpopular take. You change your mind when the argument is better.
  • You make the people around you better. Reviews are real, juniors grow from working with you, and peers want to work with you again.
  • You're curious about how markets work. Data engineering on its own won't keep you interested here.
  • You're honest about what you know and what you don't, and quick to close the gap.
  • You understand financial market data: order books, trades, reference data, portfolios, exposures. Crypto, TradFi, or both are a strong plus.

Nice to Have

  • Lakehouse experience with Apache Iceberg or Delta Lake.
  • Familiarity with DataHub or similar metadata/lineage platforms.
  • Rust. Some of our performance-critical services are written in it. Interest is welcome; fluency isn't required.

What You’ll Get

  • A from-scratch mandate. You'll be among the first hires in CDT, and the platform, the standards, and the team culture are yours to shape with us.
  • Strong partners. Close working relationships with Architecture, Infrastructure, Platform, and the desks themselves. You won't be building data in a vacuum.
  • Autonomy on how you work. Flexible hours, remote-first, business-hours on-call shared across the team.
  • A competitive salary package, with various benefits.
  • A team that likes each other. Regular online get-togethers and a yearly onsite where everyone's in the same room.

Our Recruitment Process
We’re after those with the right skills and a conscious choice to join our field. The perfect fit? Someone who’s driven, collaborative, acts with ownership and delivers solid, scalable outcomes. As an employer we are committed to building a positive and collaborative work environment. We welcome employees of all backgrounds, and hire, reward and promote entirely based on merit and performance. Due to the nature of our business and external requirements, we perform background checks on all potential employees, passing which is a prerequisite to join Key

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Data Engineer

Data Analyst Excel - Remote

YO IT Consulting

Remotefulltime

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Role description

Job Description
Job Title:
Data Analyst Excel

Job Type:
Contract

Location:
Remote

Job Summary:
In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required — your domain knowledge is what matters.

Key Responsibilities

  • Conduct in-depth data analysis using Microsoft Excel to extract actionable insights and support decision-making across teams.
  • Collaborate with project stakeholders to understand data requirements and translate them into meaningful analyses.
  • Review, clean, and validate datasets to ensure accuracy, consistency, and integrity.
  • Develop clear, concise reports and visualizations to communicate findings to both technical and non-technical audiences.
  • Identify trends, anomalies, and opportunities in complex datasets, contributing to strategic initiatives.
  • Document methodologies, results, and recommendations with meticulous attention to detail.
  • Contribute expertise to enhance data-driven decision-making processes within the customer's team.

Required Skills And Qualifications

  • Proven experience performing data analysis in a business environment using Microsoft Excel as the primary tool.
  • Exceptional attention to detail and accuracy in data processing and reporting.
  • Strong written and verbal communication skills, with the ability to clearly articulate analytical findings.
  • Demonstrated ability to work collaboratively across teams to drive business outcomes.
  • Solid understanding of Excel functions, formulas, and data visualization tools.
  • Proficiency in identifying data inconsistencies and implementing corrective measures.
  • Experience working in fast-paced, data-driven organizations.

Preferred Qualifications

  • Experience supporting cross-functional teams with data insights to inform business strategy.
  • Background in presenting analytical outcomes to diverse audiences.
  • Familiarity with additional data analysis tools or business intelligence platforms.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Data Engineer

Data & Monetization Analyst

Good Job Games

Remotefulltime

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Role description

About us

We were founded in 2017 with the motivation to reach people globally by giving them unique and unforgettable experiences with disruptive products. Our games have reached over 3.5 billion people. This could only be done by gathering exceptional talent and creating a culture to enhance team spirit and creativity. We are looking for passionate teammates to join our team!

What you’ll be doing

  • Designing, running, and analyzing
    A/B tests
    to optimize gameplay mechanics, user experience, and monetization models
  • Developing and maintaining
    player segmentation tools
    and strategies for personalized offers and engagement
  • Tracking and evaluating
    core KPIs
    (DAU, retention, ARPU, LTV) through well-structured dashboards and reports
  • Acting as the data partner for multiple teams (Product, Growth, Marketing), providing insights that shape roadmaps
  • Comfortably managing multiple priorities with minimal guidance and adapting quickly to changing business needs

Desired skills and experiences

  • 1+ year experience in data analysis, gaming, e-commerce, or digital products
  • Familiarity with monetization models, player segmentation, and in-game economy
  • Advanced SQL skills
  • Python or R is a plus
  • Experience in A/B testing methodologies
  • Skilled in predictive analytics and modeling
  • Ability to separate correlation from causation and manage biases in data
  • Passion for Match Villains and mobile puzzle games in general

What makes our team so unique

  • Feedback and transparency are at the heart of everything we do
  • Exceptional and passionate people/team members
  • Every idea counts
  • Never-ending learning
  • We never stop asking the questions “why” and “how”

Our Perks

  • Team events and trips
  • Great food
  • On-site gym
  • Full health benefits
  • Compensation for paid military service
  • Relocation support
  • Good Job Games Coin Program that lets you have unforgettable experiences (e.g. Going on a cruise trip to Norway or seeing the Northern Lights)

This is an on-site role in Istanbul, Sarıyer. We do not offer a fully-remote working option.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Data Engineer

Senior Data Engineer – Automated Canary Analysis

Spline

Remotefulltime

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Role description

Szukamy
Senior Data Engineera
do projektu budowy systemu
Automated Canary Analysis
dla dużej floty urządzeń
edge.
Celem systemu jest automatyczna analiza
telemetrii
po wdrożeniu nowej wersji oprogramowania i podejmowanie decyzji typu:
promote / pause / rollback
.

Zakres zadań

  • analiza telemetrycznych danych time-series z urządzeń edge,
  • praca z metrykami w środowisku Prometheus / VictoriaMetrics,
  • tworzenie i optymalizacja zapytań PromQL / MetricsQL,
  • wykrywanie anomalii, regresji i zmian po wdrożeniu nowej wersji,
  • porównywanie kohort canary vs baseline / control group,
  • przekładanie wyników analizy na automatyczne decyzje deploymentowe,
  • współpraca z zespołami platform, SRE/DevOps i engineering.

Wymagania

  • doświadczenie w pracy z danymi telemetrycznymi, metrykami lub time-series,
  • znajomość Prometheus, VictoriaMetrics lub podobnych narzędzi,
  • praktyczna znajomość SQL, PromQL, MetricsQL lub podobnego języka zapytań,
  • umiejętność analizy danych zaszumionych i wykrywania anomalii,
  • doświadczenie w Pythonie lub innym języku używanym do automatyzacji / data engineeringu.

Nice-to-have

  • podstawy statystyki stosowanej: A/B, A/A, kohorty, testowanie hipotez,
  • doświadczenie z CI/CD, canary deployments lub progressive delivery,
  • znajomość SRE, observability lub reliability engineering,
  • doświadczenie z dużą flotą urządzeń, edge computingiem lub systemami rozproszonymi.

Oferujemy

  • Forma współpracy: Umowa o pracę lub B2B (do wyboru).
  • Miejsce pracy: Kraków - 100% remote

Tags
#DataEngineer #Prometheus #SQL

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

Data Engineer

Billing Data Analyst

Ruby Labs

Remotefulltime

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Role description

About Us
Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we're always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about\-us/

About The Role
We are seeking a Billing Data Analyst to join our Billing and Data team. You will play a key role in analyzing financial performance, billing behavior, risk trends, and support operations. Your work will help drive better decision-making, reduce financial risks, and improve billing efficiency across all products. This role combines analytical rigor, statistical thinking, and cross-functional collaboration.

Key Responsibilities

  • Monitor, analyze, and report on key billing and support performance indicators and emerging trends.
  • Build and maintain data pipelines to ensure accurate, timely, and reliable data delivery.
  • Apply statistical methods to project scenarios, assess “what-if” outcomes, and anticipate financial risks.
  • Run A/B tests and experiments to evaluate billing and support strategies.
  • Collaborate with cross-functional teams (Billing, Support, Finance, Product, Marketing) to align processes with risk-mitigation goals.
  • Analyze the impact of marketing and product changes on billing outcomes, risk behavior, and customer support metrics.
  • Provide actionable recommendations to improve billing performance and reduce disputes, churn, and operational inefficiencies.
  • Document analyses, workflows, and data logic to ensure clarity and consistency.

Qualifications

  • Bachelor’s degree in Data Science, Statistics, Computer Science, Economics, or a related field.
  • Experience as a Data Analyst, ideally within fintech, subscription products, billing, or customer support.
  • Strong SQL skills.
  • Experience with popular BI tools such as Tableau, Looker, or similar
  • Experience with Python or R
  • Solid understanding of statistical analysis, forecasting, and scenario modeling.
  • Experience running A/B tests and interpreting experiment results.
  • Excellent problem-solving skills, attention to detail, and ability to work in a fast-paced environment.
  • Strong communication skills, with the ability to explain findings to both technical and non-technical stakeholders.
  • Curiosity, ownership mindset, and the discipline to maintain high-quality data work.

Nice to have

  • Experience with BigQuery, ClickHouse, or any cloud data warehouse.
  • Basic Python knowledge for data cleaning or simple analysis.
  • Exposure to subscription businesses or payment systems.
  • Understanding of disputes, chargebacks, declines, or fraud signals.
  • Familiarity with DBT or data quality frameworks.

Location
Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately ± 4 hours of CET. This ensures optimal collaboration and communication during working hours.

Benefits
Discover the perks of being part of our vibrant team! We offer:

  • Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
  • Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
  • Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
  • Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
  • Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1nkrN76JlZkbKj9WSOhlT1\_mni\_CZeDkHdwfIjPXVwvk/preview?tab\=t.0

Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!

Interview Process
After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:

  • Recruiter Screening (40 minutes)
  • Technical Interview (60 minutes)
  • Final Interview (30 minutes)

Life at Ruby Labs
At Ruby Labs, we move fast, aim high, and expect the same from our team. We’re not here to play small—we’re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.

This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you’re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.

Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more—more responsibility, more growth, and more success.

This is a saved copy of a posting published elsewhere. Postings get taken down without notice — check the employer's site before applying. mentors.coach is not the hiring party.

399 more openings in this category and country

Senior Data EngineerKeyrock · Hungary

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